a. Nat. Hist. [ad. mod.L. turbiniform-is, f. L. turbin-em: see TURBO and -FORM.] Top-shaped, turbinate; also, having the form of the genus Turbo of gastropods; turbinoid, spiral.
1826. Kirby & Sp., Entomol., IV. xlvi. 265. Turbiniform (Turbiniformis). Whose vertical section is turbinate, and horizontal circular. Ex. Antennæ of Alcochara socialis.
1856. Woodward, Mollusca, III. 463. Vitrinella…. Shell minute, hyaline, turbiniform, umbilicated.
